1381583650 has 12 divisors (see below), whose sum is σ = 2569745682. Its totient is φ = 552633440.

The previous prime is 1381583647. The next prime is 1381583677. The reversal of 1381583650 is 563851831.

It can be written as a sum of positive squares in 3 ways, for example, as 929213289 + 452370361 = 30483^2 + 21269^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13815787 + ... + 13815886.

Almost surely, 2^1381583650 is an apocalyptic number.

1381583650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381583650 is a deficient number, since it is larger than the sum of its proper divisors (1188162032).

1381583650 is a wasteful number, since it uses less digits than its factorization.

1381583650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27631685 (or 27631680 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 1381583650 is about 37169.6603428119. The cubic root of 1381583650 is about 1113.7619967360.

The spelling of 1381583650 in words is "one billion, three hundred eighty-one million, five hundred eighty-three thousand, six hundred fifty".